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Lars-Peter Clausen70421222012-02-13 10:25:34 +01001/* Industrialio event test code.
2 *
3 * Copyright (c) 2011-2012 Lars-Peter Clausen <lars@metafoo.de>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 *
9 * This program is primarily intended as an example application.
10 * Reads the current buffer setup from sysfs and starts a short capture
11 * from the specified device, pretty printing the result after appropriate
12 * conversion.
13 *
14 * Usage:
15 * iio_event_monitor <device_name>
Lars-Peter Clausen70421222012-02-13 10:25:34 +010016 */
17
Lars-Peter Clausen70421222012-02-13 10:25:34 +010018#include <unistd.h>
Roberta Dobrescubdcb31d2015-02-26 10:49:24 +020019#include <stdlib.h>
Lars-Peter Clausen70421222012-02-13 10:25:34 +010020#include <stdbool.h>
21#include <stdio.h>
22#include <errno.h>
23#include <string.h>
24#include <poll.h>
25#include <fcntl.h>
26#include <sys/ioctl.h>
27#include "iio_utils.h"
Jonathan Cameron06458e22012-04-25 15:54:58 +010028#include <linux/iio/events.h>
Roberta Dobrescu95763852015-02-26 10:49:23 +020029#include <linux/iio/types.h>
Lars-Peter Clausen70421222012-02-13 10:25:34 +010030
31static const char * const iio_chan_type_name_spec[] = {
32 [IIO_VOLTAGE] = "voltage",
33 [IIO_CURRENT] = "current",
34 [IIO_POWER] = "power",
35 [IIO_ACCEL] = "accel",
36 [IIO_ANGL_VEL] = "anglvel",
37 [IIO_MAGN] = "magn",
38 [IIO_LIGHT] = "illuminance",
39 [IIO_INTENSITY] = "intensity",
40 [IIO_PROXIMITY] = "proximity",
41 [IIO_TEMP] = "temp",
42 [IIO_INCLI] = "incli",
43 [IIO_ROT] = "rot",
44 [IIO_ANGL] = "angl",
45 [IIO_TIMESTAMP] = "timestamp",
46 [IIO_CAPACITANCE] = "capacitance",
Peter Meerwalda2160142012-06-15 19:25:26 +020047 [IIO_ALTVOLTAGE] = "altvoltage",
Peter Meerwald03782502014-12-06 06:00:00 +000048 [IIO_CCT] = "cct",
49 [IIO_PRESSURE] = "pressure",
50 [IIO_HUMIDITYRELATIVE] = "humidityrelative",
Daniel Baluta282a5662014-11-10 14:45:35 +020051 [IIO_ACTIVITY] = "activity",
52 [IIO_STEPS] = "steps",
Peter Meerwald30e83262015-06-20 23:52:31 +020053 [IIO_ENERGY] = "energy",
54 [IIO_DISTANCE] = "distance",
55 [IIO_VELOCITY] = "velocity",
Peter Meerwald-Stadler6ad515c2016-03-15 22:54:51 +010056 [IIO_CONCENTRATION] = "concentration",
57 [IIO_RESISTANCE] = "resistance",
58 [IIO_PH] = "ph",
Peter Meerwald-Stadlerd4094042016-03-20 16:20:23 +010059 [IIO_UVINDEX] = "uvindex",
Song Hongyan571299d2017-01-05 18:24:03 +080060 [IIO_GRAVITY] = "gravity",
Lars-Peter Clausen70421222012-02-13 10:25:34 +010061};
62
63static const char * const iio_ev_type_text[] = {
64 [IIO_EV_TYPE_THRESH] = "thresh",
65 [IIO_EV_TYPE_MAG] = "mag",
66 [IIO_EV_TYPE_ROC] = "roc",
67 [IIO_EV_TYPE_THRESH_ADAPTIVE] = "thresh_adaptive",
68 [IIO_EV_TYPE_MAG_ADAPTIVE] = "mag_adaptive",
Irina Tirdea27be8422015-01-11 21:10:11 +020069 [IIO_EV_TYPE_CHANGE] = "change",
Lars-Peter Clausen70421222012-02-13 10:25:34 +010070};
71
72static const char * const iio_ev_dir_text[] = {
73 [IIO_EV_DIR_EITHER] = "either",
74 [IIO_EV_DIR_RISING] = "rising",
75 [IIO_EV_DIR_FALLING] = "falling"
76};
77
78static const char * const iio_modifier_names[] = {
79 [IIO_MOD_X] = "x",
80 [IIO_MOD_Y] = "y",
81 [IIO_MOD_Z] = "z",
Roberta Dobrescu0a6e2172014-10-22 16:50:17 +030082 [IIO_MOD_X_AND_Y] = "x&y",
83 [IIO_MOD_X_AND_Z] = "x&z",
84 [IIO_MOD_Y_AND_Z] = "y&z",
85 [IIO_MOD_X_AND_Y_AND_Z] = "x&y&z",
86 [IIO_MOD_X_OR_Y] = "x|y",
87 [IIO_MOD_X_OR_Z] = "x|z",
88 [IIO_MOD_Y_OR_Z] = "y|z",
89 [IIO_MOD_X_OR_Y_OR_Z] = "x|y|z",
Lars-Peter Clausen70421222012-02-13 10:25:34 +010090 [IIO_MOD_LIGHT_BOTH] = "both",
91 [IIO_MOD_LIGHT_IR] = "ir",
Peter Meerwaldda4db942012-07-01 12:20:13 +020092 [IIO_MOD_ROOT_SUM_SQUARED_X_Y] = "sqrt(x^2+y^2)",
93 [IIO_MOD_SUM_SQUARED_X_Y_Z] = "x^2+y^2+z^2",
94 [IIO_MOD_LIGHT_CLEAR] = "clear",
95 [IIO_MOD_LIGHT_RED] = "red",
96 [IIO_MOD_LIGHT_GREEN] = "green",
97 [IIO_MOD_LIGHT_BLUE] = "blue",
Peter Meerwald-Stadler2c5ff1f2016-03-20 16:20:22 +010098 [IIO_MOD_LIGHT_UV] = "uv",
Roberta Dobrescu0a6e2172014-10-22 16:50:17 +030099 [IIO_MOD_QUATERNION] = "quaternion",
100 [IIO_MOD_TEMP_AMBIENT] = "ambient",
101 [IIO_MOD_TEMP_OBJECT] = "object",
102 [IIO_MOD_NORTH_MAGN] = "from_north_magnetic",
103 [IIO_MOD_NORTH_TRUE] = "from_north_true",
104 [IIO_MOD_NORTH_MAGN_TILT_COMP] = "from_north_magnetic_tilt_comp",
105 [IIO_MOD_NORTH_TRUE_TILT_COMP] = "from_north_true_tilt_comp",
Daniel Baluta282a5662014-11-10 14:45:35 +0200106 [IIO_MOD_RUNNING] = "running",
107 [IIO_MOD_JOGGING] = "jogging",
108 [IIO_MOD_WALKING] = "walking",
109 [IIO_MOD_STILL] = "still",
Peter Meerwald30e83262015-06-20 23:52:31 +0200110 [IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z] = "sqrt(x^2+y^2+z^2)",
Peter Meerwald-Stadler6ad515c2016-03-15 22:54:51 +0100111 [IIO_MOD_I] = "i",
112 [IIO_MOD_Q] = "q",
113 [IIO_MOD_CO2] = "co2",
114 [IIO_MOD_VOC] = "voc",
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100115};
116
117static bool event_is_known(struct iio_event_data *event)
118{
119 enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
120 enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
121 enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
122 enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id);
123
124 switch (type) {
125 case IIO_VOLTAGE:
126 case IIO_CURRENT:
127 case IIO_POWER:
128 case IIO_ACCEL:
129 case IIO_ANGL_VEL:
130 case IIO_MAGN:
131 case IIO_LIGHT:
132 case IIO_INTENSITY:
133 case IIO_PROXIMITY:
134 case IIO_TEMP:
135 case IIO_INCLI:
136 case IIO_ROT:
137 case IIO_ANGL:
138 case IIO_TIMESTAMP:
139 case IIO_CAPACITANCE:
Peter Meerwalda2160142012-06-15 19:25:26 +0200140 case IIO_ALTVOLTAGE:
Peter Meerwald03782502014-12-06 06:00:00 +0000141 case IIO_CCT:
142 case IIO_PRESSURE:
143 case IIO_HUMIDITYRELATIVE:
Daniel Baluta282a5662014-11-10 14:45:35 +0200144 case IIO_ACTIVITY:
145 case IIO_STEPS:
Peter Meerwald30e83262015-06-20 23:52:31 +0200146 case IIO_ENERGY:
147 case IIO_DISTANCE:
148 case IIO_VELOCITY:
Peter Meerwald-Stadler6ad515c2016-03-15 22:54:51 +0100149 case IIO_CONCENTRATION:
150 case IIO_RESISTANCE:
151 case IIO_PH:
Peter Meerwald-Stadlerd4094042016-03-20 16:20:23 +0100152 case IIO_UVINDEX:
Song Hongyan571299d2017-01-05 18:24:03 +0800153 case IIO_GRAVITY:
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100154 break;
155 default:
156 return false;
157 }
158
159 switch (mod) {
160 case IIO_NO_MOD:
161 case IIO_MOD_X:
162 case IIO_MOD_Y:
163 case IIO_MOD_Z:
Roberta Dobrescu0a6e2172014-10-22 16:50:17 +0300164 case IIO_MOD_X_AND_Y:
165 case IIO_MOD_X_AND_Z:
166 case IIO_MOD_Y_AND_Z:
167 case IIO_MOD_X_AND_Y_AND_Z:
168 case IIO_MOD_X_OR_Y:
169 case IIO_MOD_X_OR_Z:
170 case IIO_MOD_Y_OR_Z:
171 case IIO_MOD_X_OR_Y_OR_Z:
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100172 case IIO_MOD_LIGHT_BOTH:
173 case IIO_MOD_LIGHT_IR:
Peter Meerwaldda4db942012-07-01 12:20:13 +0200174 case IIO_MOD_ROOT_SUM_SQUARED_X_Y:
175 case IIO_MOD_SUM_SQUARED_X_Y_Z:
176 case IIO_MOD_LIGHT_CLEAR:
177 case IIO_MOD_LIGHT_RED:
178 case IIO_MOD_LIGHT_GREEN:
179 case IIO_MOD_LIGHT_BLUE:
Peter Meerwald-Stadler2c5ff1f2016-03-20 16:20:22 +0100180 case IIO_MOD_LIGHT_UV:
Roberta Dobrescu0a6e2172014-10-22 16:50:17 +0300181 case IIO_MOD_QUATERNION:
182 case IIO_MOD_TEMP_AMBIENT:
183 case IIO_MOD_TEMP_OBJECT:
184 case IIO_MOD_NORTH_MAGN:
185 case IIO_MOD_NORTH_TRUE:
186 case IIO_MOD_NORTH_MAGN_TILT_COMP:
187 case IIO_MOD_NORTH_TRUE_TILT_COMP:
Daniel Baluta282a5662014-11-10 14:45:35 +0200188 case IIO_MOD_RUNNING:
189 case IIO_MOD_JOGGING:
190 case IIO_MOD_WALKING:
191 case IIO_MOD_STILL:
Peter Meerwald30e83262015-06-20 23:52:31 +0200192 case IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z:
Peter Meerwald-Stadler6ad515c2016-03-15 22:54:51 +0100193 case IIO_MOD_I:
194 case IIO_MOD_Q:
195 case IIO_MOD_CO2:
196 case IIO_MOD_VOC:
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100197 break;
198 default:
199 return false;
200 }
201
202 switch (ev_type) {
203 case IIO_EV_TYPE_THRESH:
204 case IIO_EV_TYPE_MAG:
205 case IIO_EV_TYPE_ROC:
206 case IIO_EV_TYPE_THRESH_ADAPTIVE:
207 case IIO_EV_TYPE_MAG_ADAPTIVE:
Irina Tirdea27be8422015-01-11 21:10:11 +0200208 case IIO_EV_TYPE_CHANGE:
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100209 break;
210 default:
211 return false;
212 }
213
214 switch (dir) {
215 case IIO_EV_DIR_EITHER:
216 case IIO_EV_DIR_RISING:
217 case IIO_EV_DIR_FALLING:
Daniel Baluta282a5662014-11-10 14:45:35 +0200218 case IIO_EV_DIR_NONE:
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100219 break;
220 default:
221 return false;
222 }
223
224 return true;
225}
226
227static void print_event(struct iio_event_data *event)
228{
229 enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
230 enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
231 enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
232 enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id);
233 int chan = IIO_EVENT_CODE_EXTRACT_CHAN(event->id);
234 int chan2 = IIO_EVENT_CODE_EXTRACT_CHAN2(event->id);
235 bool diff = IIO_EVENT_CODE_EXTRACT_DIFF(event->id);
236
237 if (!event_is_known(event)) {
Cristina Opriceanad9abc612015-07-17 18:43:42 +0300238 fprintf(stderr, "Unknown event: time: %lld, id: %llx\n",
239 event->timestamp, event->id);
Hartmut Knaack7663a4a2015-06-10 21:51:20 +0200240
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100241 return;
242 }
243
Hartmut Knaack916e89e2015-05-31 14:40:18 +0200244 printf("Event: time: %lld, type: %s", event->timestamp,
245 iio_chan_type_name_spec[type]);
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100246
Hartmut Knaack916e89e2015-05-31 14:40:18 +0200247 if (mod != IIO_NO_MOD)
248 printf("(%s)", iio_modifier_names[mod]);
249
250 if (chan >= 0) {
251 printf(", channel: %d", chan);
252 if (diff && chan2 >= 0)
253 printf("-%d", chan2);
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100254 }
255
Hartmut Knaack916e89e2015-05-31 14:40:18 +0200256 printf(", evtype: %s", iio_ev_type_text[ev_type]);
Daniel Baluta282a5662014-11-10 14:45:35 +0200257
258 if (dir != IIO_EV_DIR_NONE)
259 printf(", direction: %s", iio_ev_dir_text[dir]);
Hartmut Knaack7663a4a2015-06-10 21:51:20 +0200260
Daniel Baluta282a5662014-11-10 14:45:35 +0200261 printf("\n");
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100262}
263
264int main(int argc, char **argv)
265{
266 struct iio_event_data event;
267 const char *device_name;
268 char *chrdev_name;
269 int ret;
270 int dev_num;
271 int fd, event_fd;
272
273 if (argc <= 1) {
Cristina Opriceanad9abc612015-07-17 18:43:42 +0300274 fprintf(stderr, "Usage: %s <device_name>\n", argv[0]);
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100275 return -1;
276 }
277
278 device_name = argv[1];
279
280 dev_num = find_type_by_name(device_name, "iio:device");
281 if (dev_num >= 0) {
282 printf("Found IIO device with name %s with device number %d\n",
Hartmut Knaack7663a4a2015-06-10 21:51:20 +0200283 device_name, dev_num);
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100284 ret = asprintf(&chrdev_name, "/dev/iio:device%d", dev_num);
Cristina Opriceana37d38e22015-07-13 16:17:47 +0300285 if (ret < 0)
Hartmut Knaack0e799872015-05-31 14:40:17 +0200286 return -ENOMEM;
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100287 } else {
Hartmut Knaack7663a4a2015-06-10 21:51:20 +0200288 /*
289 * If we can't find an IIO device by name assume device_name is
290 * an IIO chrdev
291 */
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100292 chrdev_name = strdup(device_name);
Hartmut Knaacke9e45b42015-05-31 14:40:02 +0200293 if (!chrdev_name)
294 return -ENOMEM;
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100295 }
296
297 fd = open(chrdev_name, 0);
298 if (fd == -1) {
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100299 ret = -errno;
Cristina Opriceanad9abc612015-07-17 18:43:42 +0300300 fprintf(stderr, "Failed to open %s\n", chrdev_name);
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100301 goto error_free_chrdev_name;
302 }
303
304 ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100305 if (ret == -1 || event_fd == -1) {
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100306 ret = -errno;
Linus Walleij672f93b2015-08-11 14:34:38 +0200307 if (ret == -ENODEV)
308 fprintf(stderr,
309 "This device does not support events\n");
310 else
311 fprintf(stderr, "Failed to retrieve event fd\n");
Hartmut Knaack5fdb8c62015-05-31 14:39:49 +0200312 if (close(fd) == -1)
313 perror("Failed to close character device file");
314
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100315 goto error_free_chrdev_name;
316 }
317
Hartmut Knaack963f54c2015-05-31 14:40:05 +0200318 if (close(fd) == -1) {
319 ret = -errno;
320 goto error_free_chrdev_name;
321 }
Hartmut Knaack5fdb8c62015-05-31 14:39:49 +0200322
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100323 while (true) {
324 ret = read(event_fd, &event, sizeof(event));
325 if (ret == -1) {
326 if (errno == EAGAIN) {
Cristina Opriceanad9abc612015-07-17 18:43:42 +0300327 fprintf(stderr, "nothing available\n");
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100328 continue;
329 } else {
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100330 ret = -errno;
Hartmut Knaack2b6a6e62015-05-31 14:39:48 +0200331 perror("Failed to read event from device");
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100332 break;
333 }
334 }
335
Hartmut Knaack09a33f02015-06-10 21:51:19 +0200336 if (ret != sizeof(event)) {
Cristina Opriceanad9abc612015-07-17 18:43:42 +0300337 fprintf(stderr, "Reading event failed!\n");
Hartmut Knaack09a33f02015-06-10 21:51:19 +0200338 ret = -EIO;
339 break;
340 }
341
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100342 print_event(&event);
343 }
344
Hartmut Knaack963f54c2015-05-31 14:40:05 +0200345 if (close(event_fd) == -1)
346 perror("Failed to close event file");
347
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100348error_free_chrdev_name:
349 free(chrdev_name);
Hartmut Knaack0e799872015-05-31 14:40:17 +0200350
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100351 return ret;
352}